Soot generator

Abstract

The soot generator comprises a combustion chamber ( 11 ), in which fuel ( 16 ) can be burnt with an oxidizing agent ( 21 ) in at least one soot particle-producing flame ( 33 ), a fuel feed line ( 15 ) for supplying fuel ( 16 ) to the combustion chamber ( 11 ), a soot removal line ( 36 ), which is connected to the combustion chamber ( 11 ), into which soot removal line quenching gas ( 38 ) can be conducted and out of which soot particles can be transported, and a heating device ( 25 - 31 ) for heating the fuel feed line ( 15 ) at at least one heating location ( 15 a ).

What is claimed is: 
     
       1. Soot generator, comprising
 a combustion chamber ( 11 ), in which fuel ( 16 ) can be burnt with an oxidizing agent ( 21 ) in at least one flame ( 33 ) that produces soot particles, 
 a fuel feed line ( 15 ) for supplying fuel ( 16 ) to the combustion chamber ( 11 ) and 
 a soot removal line ( 36 ), which is connected to the combustion chamber ( 11 ) and into which quenching gas ( 38 ) can be conducted and out of which soot particles can be removed, wherein the soot generator further comprises 
 a heating device ( 25 - 31 ) comprising an additional fuel feed line ( 25 ) and a preheating burner ( 30 ) connected to additional fuel feed line ( 25 ) and located in the combustion chamber ( 11 ), wherein the preheating burner ( 30 ) is used for heating the fuel feed line ( 15 ) at at least one heating location ( 15   a ) in the combustion chamber ( 11 ). 
 
     
     
       2. Soot generator according to  claim 1 , wherein the preheating burner ( 30 ) is used for creating a heating flame ( 32 ) and runs around the fuel feed line ( 15 ) or transversely thereto. 
     
     
       3. Soot generator according to  claim 2 , wherein the preheating burner has an outlet in which an aperture ( 31 ) having through-openings is situated. 
     
     
       4. Soot generator according to  claim 1 , wherein the additional fuel feed line ( 25 ) is used for supplying fuel ( 26 ), which is different from the fuel ( 16 ) in the first fuel feed line ( 15 ) and/or which is a combustible gas. 
     
     
       5. Soot generator according to  claim 4 , wherein the additional fuel feed line ( 25 ) has at least one opening ( 29 ) through which oxidizing agent ( 21 ) can be supplied for mixing with the fuel ( 26 ) directed into the additional fuel feed line ( 25 ). 
     
     
       6. Soot generator according to  claim 5 , wherein a construction ( 28 ) is provided in the additional fuel feed line ( 25 ) upstream from the at least one opening ( 29 ). 
     
     
       7. Soot generator according to  claim 4 , wherein at least one igniting means is arranged in the fuel chamber ( 11 ). 
     
     
       8. Soot generator according to  claim 7 , wherein the first fuel feed line ( 15 ) opens into an outlet ( 18 ), which has a widened shape and/or in which an aperture ( 19 ) with through-openings is arranged. 
     
     
       9. Soot generator according to  claim 8 , wherein the fuel chamber ( 11 ) is arranged transversely to the soot removal line ( 36 ), so that the flame ( 33 ) can be exposed transversely to an oncoming flow of quenching gas. 
     
     
       10. Soot generator according to  claim 9 , which has a diluting device ( 44 - 48 ) for diluting the concentration of the soot particles discharged out of the soot removal line ( 36 ). 
     
     
       11. Use of a soot generator according to  claim 1 , for producing soot particles, which can be used in particular as a soot sample and/or as a reference material and/or for calibrating measurement devices, for testing sensors and/or for testing filters. 
     
     
       12. Soot generator according to  claim 1 , wherein the quenching gas is an inert gas. 
     
     
       13. Soot generator according to  claim 1 , wherein the fuel ( 16 ) supplied into the first fuel feed line ( 15 ) is a liquid fuel. 
     
     
       14. Soot generator, comprising
 a combustion chamber ( 11 ), in which fuel ( 16 ) can be burnt with an oxidizing agent ( 21 ) in at least one flame ( 33 ) that produces soot particles, 
 a fuel feed line ( 15 ) for supplying fuel ( 16 ) to the combustion chamber ( 11 ) and 
 a soot removal line ( 36 ), which is connected to the combustion chamber ( 11 ) and into which quenching gas ( 38 ) can be conducted and out of which soot particles can be removed, wherein the soot generator further comprises 
 a heating device ( 25 - 31 ) comprising an additional fuel feed line ( 25 ) and a preheating burner ( 30 ) connected to additional fuel feed line ( 25 ) and located below the combustion chamber ( 11 ), wherein the preheating burner ( 30 ) is used for heating the fuel feed line ( 15 ) at at least one heating location ( 15 a) below the combustion chamber ( 11 ).